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/*
* This file is part of TbSync.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
"use strict";
var tools = {
load: async function () {
},
unload: async function () {
},
// async sleep function using Promise to postpone actions to keep UI responsive
sleep : function (_delay, useRequestIdleCallback = false) {
let useIdleCallback = false;
let delay = 5;//_delay;
if (TbSync.window.requestIdleCallback && useRequestIdleCallback) {
useIdleCallback = true;
delay= 2;
}
let timer = Components.classes["@mozilla.org/timer;1"].createInstance(Components.interfaces.nsITimer);
return new Promise(function(resolve, reject) {
let event = {
notify: function(timer) {
if (useIdleCallback) {
TbSync.window.requestIdleCallback(resolve);
} else {
resolve();
}
}
}
timer.initWithCallback(event, delay, Components.interfaces.nsITimer.TYPE_ONE_SHOT);
});
},
// this is derived from: http://jonisalonen.com/2012/from-utf-16-to-utf-8-in-javascript/
// javascript strings are utf16, btoa needs utf8 , so we need to encode
toUTF8: function (str) {
var utf8 = "";
for (var i=0; i < str.length; i++) {
var charcode = str.charCodeAt(i);
if (charcode < 0x80) utf8 += String.fromCharCode(charcode);
else if (charcode < 0x800) {
utf8 += String.fromCharCode(0xc0 | (charcode >> 6),
0x80 | (charcode & 0x3f));
}
else if (charcode < 0xd800 || charcode >= 0xe000) {
utf8 += String.fromCharCode(0xe0 | (charcode >> 12),
0x80 | ((charcode>>6) & 0x3f),
0x80 | (charcode & 0x3f));
}
// surrogate pair
else {
i++;
// UTF-16 encodes 0x10000-0x10FFFF by
// subtracting 0x10000 and splitting the
// 20 bits of 0x0-0xFFFFF into two halves
charcode = 0x10000 + (((charcode & 0x3ff)<<10)
| (str.charCodeAt(i) & 0x3ff))
utf8 += String.fromCharCode(0xf0 | (charcode >>18),
0x80 | ((charcode>>12) & 0x3f),
0x80 | ((charcode>>6) & 0x3f),
0x80 | (charcode & 0x3f));
}
}
return utf8;
},
b64encode: function (str) {
return btoa(this.toUTF8(str));
}
}
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